| 100% | USAGE | 5 | What a water bill is based on |
| 82% | USAGE | 5 | What a utility bill is based on |
| 66% | USAGE | 5 | What an electric bill is based on |
| 52% | CATCHPHRASE | 11 | Familiar slogan ... or, based on its last word, what each answer to a starred clue is? |
| 51% | ECOWARRIORS | 11 | Based on a common feature of their names, what 17-, 23-, 36- and 51-Across are well-suited to be? |
| 51% | PREMISE | 7 | What a movie or an argument is based on |
| 51% | PAPERCARRIERS | 13 | Morning news deliverers ... or based on a hidden word in each, what 20-, 27- and 43-Across are? |
| 51% | MERIT | 5 | What some college scholarships are based on |
| 51% | TOWROPE | 7 | What a water-skier hangs on to |
| 51% | REUBEN | 6 | What a Rachel is a variation on |
| 51% | SLANT | 5 | What a roof is usually built on |
| 51% | SPEC | 4 | What a crossword is often constructed on |
| 51% | TRAY | 4 | What a hospital meal is served on |
| 51% | SPEC | 4 | What a script may be written on |
| 51% | EGOTRIP | 7 | What a big winner might be on |
| 51% | NOTECARD | 8 | What a recipe may be written on |
| 51% | BAIL | 4 | What a felon may be free on |
| 51% | RAFT | 4 | What a shipwreck survivor might be on |
| 50% | DATA | 4 | What A.I. is trained on |
| 49% | TRUE | 4 | "This movie is based on a ___ story" |
| 49% | ERRAND | 6 | What a gofer is sent on |
| 49% | POLE | 4 | What a flag is raised on |
| 49% | ONELEG | 6 | What a pirouette is performed on |
| 48% | SAIL | 4 | What a jib is, on a ship |
| 48% | ENV | 3 | What a stamp is stuck on: Abbr. |
| 48% | UNIX | 4 | What macOS is based on |
| 48% | ODDS | 4 | What payoffs are based on |
| 47% | CBS | 3 | Its logo is based on a Pennsylvania Dutch hex sign |
| 47% | BOIL | 4 | What a heated pot of water will do |
| 47% | TWOBASES | 8 | What a double is worth on the diamond |